/*
 * Jeditable - jQuery in place edit plugin
 *
 * Copyright (c) 2006-2009 Mika Tuupola, Dylan Verheul
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Project home:
 *   http://www.appelsiini.net/projects/jeditable
 *
 * Based on editable by Dylan Verheul <dylan_at_dyve.net>:
 *    http://www.dyve.net/jquery/?editable
 *
 */

/**
  * Version 1.7.1
  *
  * ** means there is basic unit tests for this parameter. 
  *
  * @name  Jeditable
  * @type  jQuery
  * @param String  target             (POST) URL or function to send edited content to **
  * @param Hash    options            additional options 
  * @param String  options[method]    method to use to send edited content (POST or PUT) **
  * @param Function options[callback] Function to run after submitting edited content **
  * @param String  options[name]      POST parameter name of edited content
  * @param String  options[id]        POST parameter name of edited div id
  * @param Hash    options[submitdata] Extra parameters to send when submitting edited content.
  * @param String  options[type]      text, textarea or select (or any 3rd party input type) **
  * @param Integer options[rows]      number of rows if using textarea ** 
  * @param Integer options[cols]      number of columns if using textarea **
  * @param Mixed   options[height]    'auto', 'none' or height in pixels **
  * @param Mixed   options[width]     'auto', 'none' or width in pixels **
  * @param String  options[loadurl]   URL to fetch input content before editing **
  * @param String  options[loadtype]  Request type for load url. Should be GET or POST.
  * @param String  options[loadtext]  Text to display while loading external content.
  * @param Mixed   options[loaddata]  Extra parameters to pass when fetching content before editing.
  * @param Mixed   options[data]      Or content given as paramameter. String or function.**
  * @param String  options[indicator] indicator html to show when saving
  * @param String  options[tooltip]   optional tooltip text via title attribute **
  * @param String  options[event]     jQuery event such as 'click' of 'dblclick' **
  * @param String  options[submit]    submit button value, empty means no button **
  * @param String  options[cancel]    cancel button value, empty means no button **
  * @param String  options[cssclass]  CSS class to apply to input form. 'inherit' to copy from parent. **
  * @param String  options[style]     Style to apply to input form 'inherit' to copy from parent. **
  * @param String  options[select]    true or false, when true text is highlighted ??
  * @param String  options[placeholder] Placeholder text or html to insert when element is empty. **
  * @param String  options[onblur]    'cancel', 'submit', 'ignore' or function ??
  *             
  * @param Function options[onsubmit] function(settings, original) { ... } called before submit
  * @param Function options[onreset]  function(settings, original) { ... } called before reset
  * @param Function options[onerror]  function(settings, original, xhr) { ... } called on error
  *             
  * @param Hash    options[ajaxoptions]  jQuery Ajax options. See docs.jquery.com.
  *             
  */

(function($) {

	$.fn.editable = function(target, options) {

		if ('disable' == target) {
			$(this).data('disabled.editable', true);
			return;
		}
		if ('enable' == target) {
			$(this).data('disabled.editable', false);
			return;
		}
		if ('destroy' == target) {
			$(this)
                .unbind($(this).data('event.editable'))
                .removeData('disabled.editable')
                .removeData('event.editable');
			return;
		}

		var settings = $.extend({}, $.fn.editable.defaults, { target: target }, options);

		/* setup some functions */
		var plugin = $.editable.types[settings.type].plugin || function() { };
		var submit = $.editable.types[settings.type].submit || function() { };
		var buttons = $.editable.types[settings.type].buttons
                    || $.editable.types['defaults'].buttons;
		var content = $.editable.types[settings.type].content
                    || $.editable.types['defaults'].content;
		var element = $.editable.types[settings.type].element
                    || $.editable.types['defaults'].element;
		var reset = $.editable.types[settings.type].reset
                    || $.editable.types['defaults'].reset;
		var callback = settings.callback || function() { };
		var onedit = settings.onedit || function() { };
		var onsubmit = settings.onsubmit || function() { };
		var onreset = settings.onreset || function() { };
		var onerror = settings.onerror || reset;

		/* show tooltip */
		if (settings.tooltip) {
			$(this).attr('title', settings.tooltip);
		}

		settings.autowidth = 'auto' == settings.width;
		settings.autoheight = 'auto' == settings.height;

		return this.each(function() {

			/* save this to self because this changes when scope changes */
			var self = this;

			/* inlined block elements lose their width and height after first edit */
			/* save them for later use as workaround */
			var savedwidth = $(self).width();
			var savedheight = $(self).height();

			/* save so it can be later used by $.editable('destroy') */
			$(this).data('event.editable', settings.event);

			/* if element is empty add something clickable (if requested) */
			if (!$.trim($(this).html())) {
				$(this).html(settings.placeholder);
			}

			$(this).bind(settings.event, function(e) {

				/* abort if disabled for this element */
				if (true === $(this).data('disabled.editable')) {
					return;
				}

				/* prevent throwing an exeption if edit field is clicked again */
				if (self.editing) {
					return;
				}

				/* abort if onedit hook returns false */
				if (false === onedit.apply(this, [settings, self])) {
					return;
				}

				/* prevent default action and bubbling */
				e.preventDefault();
				e.stopPropagation();

				/* remove tooltip */
				if (settings.tooltip) {
					$(self).removeAttr('title');
				}

				/* figure out how wide and tall we are, saved width and height */
				/* are workaround for http://dev.jquery.com/ticket/2190 */
				if (0 == $(self).width()) {
					//$(self).css('visibility', 'hidden');
					settings.width = savedwidth;
					settings.height = savedheight;
				} else {
					if (settings.width != 'none') {
						settings.width =
                            settings.autowidth ? $(self).width() : settings.width;
					}
					if (settings.height != 'none') {
						settings.height =
                            settings.autoheight ? $(self).height() : settings.height;
					}
				}
				//$(this).css('visibility', '');

				/* remove placeholder text, replace is here because of IE */
				if ($(this).html().toLowerCase().replace(/(;|")/g, '') ==
                    settings.placeholder.toLowerCase().replace(/(;|")/g, '')) {
					$(this).html('');
				}

				self.editing = true;
				self.revert = $(self).text();
				$(self).html('');

				/* create the form object */
				var form = $('<form />');

				/* apply css or style or both */
				if (settings.cssclass) {
					if ('inherit' == settings.cssclass) {
						form.attr('class', $(self).attr('class'));
					} else {
						form.attr('class', settings.cssclass);
					}
				}

				if (settings.style) {
					if ('inherit' == settings.style) {
						form.attr('style', $(self).attr('style'));
						/* IE needs the second line or display wont be inherited */
						form.css('display', $(self).css('display'));
					} else {
						form.attr('style', settings.style);
					}
				}

				/* add main input element to form and store it in input */
				var input = element.apply(form, [settings, self]);

				/* set input content via POST, GET, given data or existing value */
				var input_content;

				if (settings.loadurl) {
					var t = setTimeout(function() {
						input.disabled = true;
						content.apply(form, [settings.loadtext, settings, self]);
					}, 100);

					var loaddata = {};
					loaddata[settings.id] = self.id;
					if ($.isFunction(settings.loaddata)) {
						$.extend(loaddata, settings.loaddata.apply(self, [self.revert, settings]));
					} else {
						$.extend(loaddata, settings.loaddata);
					}
					$.ajax({
						type: settings.loadtype,
						url: settings.loadurl,
						data: loaddata,
						async: false,
						success: function(result) {
							window.clearTimeout(t);
							input_content = result;
							input.disabled = false;
						}
					});
				} else if (settings.data) {
					input_content = settings.data;
					if ($.isFunction(settings.data)) {
						input_content = settings.data.apply(self, [self.revert, settings]);
					}
				} else {
					input_content = self.revert;
				}
				content.apply(form, [input_content, settings, self]);

				input.attr('name', settings.name);

				/* add buttons to the form */
				buttons.apply(form, [settings, self]);

				/* add created form to self */
				$(self).append(form);

				/* attach 3rd party plugin if requested */
				plugin.apply(form, [settings, self]);

				/* focus to first visible form element */
				$(':input:visible:enabled:first', form).focus();

				/* highlight input contents when requested */
				if (settings.select) {
					input.select();
				}

				/* discard changes if pressing esc */
				input.keydown(function(e) {
					if (e.keyCode == 27) {
						e.preventDefault();
						//self.reset();
						reset.apply(form, [settings, self]);
					}
				});

				/* discard, submit or nothing with changes when clicking outside */
				/* do nothing is usable when navigating with tab */
				var t;
				if ('cancel' == settings.onblur) {
					input.blur(function(e) {
						/* prevent canceling if submit was clicked */
						t = setTimeout(function() {
							reset.apply(form, [settings, self]);
						}, 500);
					});
				} else if ('submit' == settings.onblur) {
					input.blur(function(e) {
						/* prevent double submit if submit was clicked */
						t = setTimeout(function() {
							form.submit();
						}, 200);
					});
				} else if ($.isFunction(settings.onblur)) {
					input.blur(function(e) {
						settings.onblur.apply(self, [input.val(), settings]);
					});
				} else {
					input.blur(function(e) {
						/* TODO: maybe something here */
					});
				}

				form.submit(function(e) {

					if (t) {
						clearTimeout(t);
					}

					/* do no submit */
					e.preventDefault();

					/* call before submit hook. */
					/* if it returns false abort submitting */
					if (false !== onsubmit.apply(form, [settings, self])) {
						/* custom inputs call before submit hook. */
						/* if it returns false abort submitting */
						if (false !== submit.apply(form, [settings, self])) {

							/* check if given target is function */
							if ($.isFunction(settings.target)) {
								var str = settings.target.apply(self, [input.val(), settings]);
								$(self).html(str);
								self.editing = false;
								callback.apply(self, [self.innerHTML, settings]);
								/* TODO: this is not dry */
								if (!$.trim($(self).html())) {
									$(self).html(settings.placeholder);
								}
							} else {
								/* add edited content and id of edited element to POST */
								var submitdata = {};
								submitdata[settings.name] = input.val();
								submitdata[settings.id] = self.id;
								/* add extra data to be POST:ed */
								if ($.isFunction(settings.submitdata)) {
									$.extend(submitdata, settings.submitdata.apply(self, [self.revert, settings]));
								} else {
									$.extend(submitdata, settings.submitdata);
								}

								/* quick and dirty PUT support */
								if ('PUT' == settings.method) {
									submitdata['_method'] = 'put';
								}

								/* show the saving indicator */
								$(self).html(settings.indicator);

								/* defaults for ajaxoptions */
								var ajaxoptions = {
									type: 'POST',
									data: submitdata,
									dataType: 'html',
									url: settings.target,
									success: function(result, status) {
										if (ajaxoptions.dataType == 'html') {
											$(self).html(result);
										}
										self.editing = false;
										callback.apply(self, [result, settings]);
										if (!$.trim($(self).html())) {
											$(self).html(settings.placeholder);
										}
									},
									error: function(xhr, status, error) {
										onerror.apply(form, [settings, self, xhr]);
									}
								};

								/* override with what is given in settings.ajaxoptions */
								$.extend(ajaxoptions, settings.ajaxoptions);
								$.ajax(ajaxoptions);

							}
						}
					}

					/* show tooltip again */
					$(self).attr('title', settings.tooltip);

					return false;
				});
			});

			/* privileged methods */
			this.reset = function(form) {
				/* prevent calling reset twice when blurring */
				if (this.editing) {
					/* before reset hook, if it returns false abort reseting */
					if (false !== onreset.apply(form, [settings, self])) {
						$(self).html(self.revert);
						self.editing = false;
						if (!$.trim($(self).html())) {
							$(self).html(settings.placeholder);
						}
						/* show tooltip again */
						if (settings.tooltip) {
							$(self).attr('title', settings.tooltip);
						}
					}
				}
			};
		});

	};


	$.editable = {
		types: {
			defaults: {
				element: function(settings, original) {
					var input = $('<input type="hidden"></input>');
					$(this).append(input);
					return (input);
				},
				content: function(string, settings, original) {
					$(':input:first', this).val(string);
				},
				reset: function(settings, original) {
					original.reset(this);
				},
				buttons: function(settings, original) {
					var form = this;
					if (settings.submit) {
						/* if given html string use that */
						if (settings.submit.match(/>$/)) {
							var submit = $(settings.submit).click(function() {
								if (submit.attr("type") != "submit") {
									form.submit();
								}
							});
							/* otherwise use button with given string as text */
						} else {
							var submit = $('<button type="submit" />');
							submit.html(settings.submit);
						}
						$(this).append(submit);
					}
					if (settings.cancel) {
						/* if given html string use that */
						if (settings.cancel.match(/>$/)) {
							var cancel = $(settings.cancel);
							/* otherwise use button with given string as text */
						} else {
							var cancel = $('<button type="cancel" />');
							cancel.html(settings.cancel);
						}
						$(this).append(cancel);

						$(cancel).click(function(event) {
							//original.reset();
							if ($.isFunction($.editable.types[settings.type].reset)) {
								var reset = $.editable.types[settings.type].reset;
							} else {
								var reset = $.editable.types['defaults'].reset;
							}
							reset.apply(form, [settings, original]);
							return false;
						});
					}
				}
			},
			text: {
				element: function(settings, original) {
					var input = $('<input />');
					if (settings.width != 'none') { input.width(settings.width); }
					if (settings.height != 'none') { input.height(settings.height); }
					/* https://bugzilla.mozilla.org/show_bug.cgi?id=236791 */
					//input[0].setAttribute('autocomplete','off');
					input.attr('autocomplete', 'off');
					input.attr('maxlength', settings.maxlength);
					$(this).append(input);
					return (input);
				}
			},
			textarea: {
				element: function(settings, original) {
					var textarea = $('<textarea />');
					if (settings.rows) {
						textarea.attr('rows', settings.rows);
					} else if (settings.height != "none") {
						textarea.height(settings.height);
					}
					if (settings.cols) {
						textarea.attr('cols', settings.cols);
					} else if (settings.width != "none") {
						textarea.width(settings.width);
					}
					$(this).append(textarea);
					return (textarea);
				}
			},
			select: {
				element: function(settings, original) {
					var select = $('<select />');
					$(this).append(select);
					return (select);
				},
				content: function(data, settings, original) {
					/* If it is string assume it is json. */
					if (String == data.constructor) {
						eval('var json = ' + data);
					} else {
						/* Otherwise assume it is a hash already. */
						var json = data;
					}
					for (var key in json) {
						if (!json.hasOwnProperty(key)) {
							continue;
						}
						if ('selected' == key) {
							continue;
						}
						var option = $('<option />').val(key).append(json[key]);
						$('select', this).append(option);
					}
					/* Loop option again to set selected. IE needed this... */
					$('select', this).children().each(function() {
						if ($(this).val() == json['selected'] ||
                            $(this).text() == $.trim(original.revert)) {
							$(this).attr('selected', 'selected');
						}
					});
				}
			}
		},

		/* Add new input type */
		addInputType: function(name, input) {
			$.editable.types[name] = input;
		}
	};

	// publicly accessible defaults
	$.fn.editable.defaults = {
		name: 'value',
		id: 'id',
		type: 'text',
		maxlength: 100,
		width: 'auto',
		height: 16,
		event: 'click.editable',
		onblur: 'cancel',
		loadtype: 'GET',
		loadtext: 'Loading...',
		placeholder: 'Click to edit',
		loaddata: {},
		submitdata: {},
		ajaxoptions: {}
	};

})(jQuery);
